Expansion valve



FIG. 1 is a front perspective view of an expansion valve showing our new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a left side view thereof, the right side view being a mirror image thereof.

The broken lines are for the purpose of illustrating portions of the expansion valve and form no part of the claimed design. 

CLAIM The ornamental design for an expansion valve, as shown and described. 